Unity-greeter crashes, and constantly respawns, not letting me in. So, I configured auto login but that won't start anything except Unity session. I changed the lightdm.conf file to run Xubuntu but Unity still shows up. If I create a new user, it will start in Xubuntu just fine. I deleted my .conf XFCE prefs and that fixed nothing.

I can at least get in to the gtk login greeter but then the onboard keyboard does not show up. If I could get the onboard keyboard in the gtk greeter, I would be super happy. The onboard keyboard shows up in the Unity greeter just fine. But not the gtk greeter.

I don't have a solid keyboard because it is a tablet. So, I need the onboard in the greeter.

There still seems like there is no way to get an on screen keyboard in the gtk greeter.
Enabling the onscreen keyboard in the unity-greeter is somewhat easy but after a lot of research it appears that no one has done the development necessary to start an onscreen keyboard in the gtk greeter.

My particular problem however, does have a hack/fix. That is, I switched on "user does not need password on login"

This feature makes it so when the gtk greeter comes up, I only need to click on my user name to login. My user still has a password which I can use for package management etc. But for simply logging in , turning off the need to enter a password gives me at least a temporary fix...